Unverified Commit 21f4f924 authored by Sunil V L's avatar Sunil V L Committed by Palmer Dabbelt
Browse files

clocksource/timer-riscv: Add ACPI support 



Initialize the timer driver based on RHCT table on ACPI based
platforms.

Currently, ACPI doesn't support a flag to indicate that the
timer interrupt can wake up the cpu irrespective of its
power state. It will be added in future update.

Signed-off-by: default avatarSunil V L <sunilvl@ventanamicro.com>
Acked-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: default avatarAndrew Jones <ajones@ventanamicro.com>
Reviewed-by: default avatarConor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20230515054928.2079268-19-sunilvl@ventanamicro.com


Signed-off-by: default avatarPalmer Dabbelt <palmer@rivosinc.com>
parent cd12d206

drivers/clocksource/timer-riscv.c

+11 −0
Original line number Diff line number Diff line
@@ -10,6 +10,7 @@ 


#define pr_fmt(fmt) "riscv-timer: " fmt



#include <linux/acpi.h>

#include <linux/clocksource.h>

#include <linux/clockchips.h>

#include <linux/cpu.h>
@@ -207,3 +208,13 @@ static int __init riscv_timer_init_dt(struct device_node *n) 
}



TIMER_OF_DECLARE(riscv_timer, "riscv", riscv_timer_init_dt);



#ifdef CONFIG_ACPI

static int __init riscv_timer_acpi_init(struct acpi_table_header *table)

{

	return riscv_timer_init_common();

}



TIMER_ACPI_DECLARE(aclint_mtimer, ACPI_SIG_RHCT, riscv_timer_acpi_init);



#endif